A080433 a(1) = 2; for n>1, a(n) = smallest multiple of n beginning with the least significant digit of a(n-1) > n and not divisible by 10 if n is not of the type 10k; otherwise a(n) ends in 0 and a(n+1) begins with the first nonzero digit from the right(LSD) of a(n).

2, 22, 24, 44, 45, 54, 49, 96, 63, 30, 33, 36, 65, 56, 615, 512, 221, 108, 817, 700, 714, 44, 46, 624, 425, 52, 216

Offset

1,1

Comments

Why is a(3) = 24 (instead of 21), why is a(7) = 49 (instead of 42), why is a(17) = 221 (instead of 204)? - Sean A. Irvine, Sep 22 2025

Links

Table of n, a(n) for n=1..27.

Example

a(9) = 63, a(10) = 30 and a(11) = 33 (begins with 3); a(20) = 700 and a(21) = 714.

Crossrefs

Sequence in context: A153826 A080283 A228112 * A022373 A393717 A111751

Adjacent sequences: A080430 A080431 A080432 * A080434 A080435 A080436

Keyword

base,nonn,more,obsc

Author

Amarnath Murthy, Feb 20 2003

Extensions

Offset corrected by Sean A. Irvine, Sep 18 2025

Status

approved